They were pretty prompt at surfacing a couple of Tridents during an earlier confrontation between China and their neighbors ....... in Subic Bay, for instance, and Diego Garcia. The Chinese didn't like that.
The Regime also transited a CBG across the South China Sea the minute the Chinese declared that it was Chinese territory all the way to the Philippines and Borneo, including the sea bottom and the water column.
Barky's willingness to play gunboat diplomacy with the Chinese is a little puzzling, given his other, um, "predilections". For ring-kissing, for example.
Also, BO spent a number of years in Indonesia - Chinese are rather disliked there, historically.